261007171270019 has 2 divisors, whose sum is σ = 261007171270020. Its totient is φ = 261007171270018.

The previous prime is 261007171269979. The next prime is 261007171270073. The reversal of 261007171270019 is 910072171700162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261007171270019 - 2²⁰ = 261007170221443 is a prime.

It is a super-2 number, since 2×261007171270019² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (261007171272019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130503585635009 + 130503585635010.

It is an arithmetic number, because the mean of its divisors is an integer number (130503585635010).

Almost surely, 2^{261007171270019} is an apocalyptic number.

261007171270019 is a deficient number, since it is larger than the sum of its proper divisors (1).

261007171270019 is an equidigital number, since it uses as much as digits as its factorization.

261007171270019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 74088, while the sum is 44.

The spelling of 261007171270019 in words is "two hundred sixty-one trillion, seven billion, one hundred seventy-one million, two hundred seventy thousand, nineteen".